77. Effect of postponement on validity of gift.

Except in cases where by statute the age of 21 years is substituted for a greater age1:


    (1)     a direction that an unborn devisee or alienee is not to be entitled to possession of his estate until either attaining a certain age greater than 21 or other remote event; or


    (2)     a condition making a gift to an individual or class dependent upon the attaining of such an age or upon the happening of such an event,

may constitute a condition precedent to the vesting of the estate, and render the limitation void under the rule against perpetuities2.

Such a direction